Meta Software Developer interview questions

I got a chance of phone interview with Facebook through Interviewstreet about a year and a half ago and failed quickly, mostly because I'm not a native English speaker and I am really bad at speaking English. I keep practicing English after that, then I got another chance 2 months ago, recommended by a friend interning at Facebook. The recruiter return to me very quickly, in less than a week, but I'm very busy and not well prepared at that time, so I did the phone interview a month later. I was asked to solve an easy coding problem, I finished it very quickly but made a small mistake in analyzing the complexity. I only found that mistake after the interview. The interviewer is very experienced, I have a great time talking to him after the coding phrase. Then I got a chance to onsite. I had 3 interviews. 2 interviewers asked coding problems and 1 asked coding problems and also talked about my projects in resume. The problems are harder than the problem in phone interview. I really struggled at 1 of them. But I think I did a good job at another ones. The interviewer who talking with me about my projects is from a strong background and seems a little tough, I must say I was very nervous when talking to him, but luckily it turned out well. In overall, the recruiters and the interviewers are all very nice. I am not familiar with the process of interviewing with companies in U.S and asked so many questions, the recruiters replied very quickly.

I was referred by a college friend. The whole precess was about 3 weeks (excluding time to get visa, Christmas and new year holidays). Interview Details Started with a friendly talk with the recruiter, had 1 phone screen and then 4 on-site interviews + 1 lunch interview. Everyone was was very Smart and kind of friendly during the interview.